This video illustrates us how to repair spalled concrete. Here are the following steps:Step 1: First of all take cement and sand'Step 2: Mix it in the ratio 1:3 that is cement one part and sand three partsStep 3: Now add water and mix the mixture well.Step 4 : Now apply this mixture for filling the spalled concrete.Step 5: Polyurea can also be used to fill the crackStep 6: Let the repair work done dry.Step 7: After around 28 days apply a water proof primer on the repaired work to prevent further damage.that's it